St. John's Northwestern Academies Photo #0 - St. John's Northwestern Academies is an independent, coeducational, college preparatory boarding and day school for grades 6-12. Since 1884, they develop moral and ethical leaders who are inspired to improve the world through two paths! Their Military Academy pursues its mission using military leader development principles. Their Prefect Academy pursues its mission using contemporary organizational leader development principles. #LeadershipLivesHere

St. John's Northwestern Academies

1101 Genesee Street
Delafield, WI 53018
previous
St. John's Northwestern Academies Photo #1 - St. John's Northwestern Academies is an independent, coeducational, college preparatory boarding and day school for grades 6-12. Since 1884, they develop moral and ethical leaders who are inspired to improve the world through two paths! Their Military Academy pursues its mission using military leader development principles. Their Prefect Academy pursues its mission using contemporary organizational leader development principles. #LeadershipLivesHere
next
St. John's Northwestern Academies Photo #1 - St. John's Northwestern Academies is an independent, coeducational, college preparatory boarding and day school for grades 6-12. Since 1884, they develop moral and ethical leaders who are inspired to improve the world through two paths! Their Military Academy pursues its mission using military leader development principles. Their Prefect Academy pursues its mission using contemporary organizational leader development principles. #LeadershipLivesHere
St. John's Northwestern has been shaping the minds and developing the character of students since 1884.
Academy alumni have attended notable colleges and universities.  As a college preparatory and leader development, boarding and day school for young men and women in grades 6 through 12, St. John's Northwestern Academies is a safe, structured environment that provides each student a foundation for life with specialized programs that are built with future aspirations in mind.
Surrounded by English gothic-style architecture, broad lawns, and towering trees, students living within the historic campus are immersed in a safe and secure environment in which they build self-esteem, self-discipline, academic focus and intellectual curiosity that allows them to "work hard, play hard, pray hard."

Quick Facts (2026)

  • Grades: 6-12, PG
  • Enrollment: 201 students
  • Yearly Tuition (Boarding Students): $49,100
  • Yearly Tuition (Day Students): $22,500
  • Acceptance rate: 84%
  • Average class size: 10 students
  • Application Deadline: None / Rolling
  • Source: Verified school update

Top Rankings

St. John's Northwestern Academies ranks among the top 5 military schools (out of 17 military schools) for:

Category
Attribute
Student Attention
Offering Breadth
Student Test Scores
Student Test Scores
School History

School Overview

Definition of Terms | 2025 School Data
St. John's Northwestern Academies
Boarding School Avg.
School Focus
College Preparatory
Grades Offered
6-12, PG
9-12
School Type
Co-ed
Co-ed
ADD/ADHD Support
Yes
Religious Affiliation
Non-denominational
Year Founded
1884
1909
Campus Size
80 acres
125 acres
Colors
White, Black, Red, Purple, Red/Black/White
School Calendar

Student Body

Enrollment
201 students
300 students
% Students of Color
24%
25%
% International Students
37%
20%
% Students Boarding
86%
70%
Average SAT Score
1130
(Out of 1600)
* National Avg. »View
Average ACT score
23
(Out of 36)
*National Avg. »View
Offers Post-Grad Year
Yes
No

Academics and Faculty

Saturday Classes
No
No
Classroom Dress Code
Formal
Uniforms
Casual
Average Class Size
10 students
12
* National Avg. »18
Student-Teacher Ratio
12:1
7:1
# of AP / Advanced Courses Offered
5
17
ESL Courses Offered
Yes
% Faculty with Advanced Degree
50%
70%
Summer Program Offered
Yes
Summer Program Details

Tuition Cost

Yearly Tuition
(Boarding Students)
$49,100
$59,900
Yearly Tuition
(Day Students)
$22,500
$33,500
Tuition international students
$56,300
$53,975
Yearly Tuition
(5 Day Boarding)
$39,900
$44,000
Summer Program Cost
Merit Scholarships Offered
No

Admissions

Application Deadline
None / Rolling
Jan. 15
Acceptance Rate
84%
58%
Director of Admissions
Juan Garcia
Application URL

AP / Advanced Courses

# of AP / Advanced Courses Offered
5
17
Courses
Calculus Chemistry
Literature and Composition Physics
Statistics U.S. History
Biology

Sports

School Notes

  • As a college preparatory and leader development, boarding and day school for young men and women in grades 6 through 12, St. John's Northwestern Academies educates and develops young men and women to be responsible citizens, as well as moral and ethical leaders who are inspired to take advantage of today and tomorrow's opportunities. They achieve this through their foundational pillars of academic excellence, enriching spiritual and character development, outstanding athletic programs, and premier leader development training in a secure, nurturing and inclusive environment.
  • St. John's Northwestern Academies accreditations: ISACS
  • Sample of notable school alumni/alumnae:
    • Daniel Gerber 1916 - Founder and president of Gerber Baby Foods
    • Howard Woodin 1918 - Member of Marquette University Hall of Fame and Green Bay Packers Hall of Fame for football
    • Spencer Tracy 1919 - Distinguished actor; Academy Award winner; appeared in over 70 films
    • Arthur Wermuth 1932 - Major, U.S. Army; World War II hero
    • Edward Noble 1946 - Entrepreneur; developer; and manufacturer; served as a member of President Ronald Regan's staff
    • C. Roosevelt Boettiger 1948 - Grandson of President Franklin D. Roosevelt; U.S. delegate to the United Nations
    • William J. Janklow 1954 - Governor of South Dakota for four terms, longer than anyone in state history
    • Ty Warner 1962 - Founder and C.E.O. of Beanie Babies, Inc., a leader in the toy industry
    • Jay Graf 1966 - Founder and C.E.O. of Guidant Corp., a leader in the heart monitoring field
    • Martin Torrijos Espino 1981 - Former President of Panama from 2004 to 2009
  • School Motto: Not specified
Source: Verified school update

Frequently Asked Questions

How much does St. John's Northwestern Academies cost?
St. John's Northwestern Academies's tuition is approximately $49,100 for boarding students and $22,500 for day students.
What is the acceptance rate of St. John's Northwestern Academies?
The acceptance rate of St. John's Northwestern Academies is 84%, which is higher than the boarding school average of 58%.
Who are famous alumni from St. John's Northwestern Academies?
St. John's Northwestern Academies famous alumni include: Daniel Gerber 1916, Howard Woodin 1918, Spencer Tracy 1919, Arthur Wermuth 1932, Edward Noble 1946, C. Roosevelt Boettiger 1948, William J. Janklow 1954, Ty Warner 1962, Jay Graf 1966 and Martin Torrijos Espino 1981.
What sports does St. John's Northwestern Academies offer?
St. John's Northwestern Academies offers 16 interscholastic sports: Baseball, Basketball, Cross Country, Drill Team, Football, Golf, Ice Hockey, Lacrosse, Orienteering, Riflery, Soccer, Softball, Swimming, Tennis, Track and Field and Wrestling. St. John's Northwestern Academies is ranked as one of the top boarding schools for most sports offered.
Does St. John's Northwestern Academies offer a summer program?
Yes, St. John's Northwestern Academies offers a summer program. Visit their summer school page for more information.
What is St. John's Northwestern Academies's ranking?
St. John's Northwestern Academies ranks among the top 20 boarding schools for Small average class sizes, Most sports offered, High average SAT scores, High ACT scores and Oldest founding date.
When is the application deadline for St. John's Northwestern Academies?
The application deadline for St. John's Northwestern Academies is rolling (applications are reviewed as they are received year-round).

Alumni Reviews Review School

Review
Description

Class of 2004
5.00
MSOE, UW- Green Bay
SJNMA offers a unique and safe environment. The faculty care about the cadets more than anything else. It's safe location physically located in the suburbs along with on campus security provide a great place. . .

Class of 2012
5.00
College of DuPage
I liked that we had structure. It taught me how to be on time and responsible. I also really liked that it was all guys. It made it easier to learn. Our teachers bent over. . .

Class of 2014
5.00
Marquette University
The military traditions sets the school apart from other more traditional boarding school experiences. Very structured but always surrounded by other cadets in your company that doesn't make it feel like "all work and no. . .
Show more reviews (1 review)
Submit Review for St. John's Northwestern Academies
Earn $20 by submitting your alumni review!

Recent Articles

Famous Boarding School Alumni & Parent Lessons
Famous Boarding School Alumni & Parent Lessons
Discover what famous boarding school alumni teach parents about leadership, resilience, and opportunity in 2026.
Boarding Life for Student Athletes in 2026
Boarding Life for Student Athletes in 2026
Explore how boarding schools help student athletes balance academics and competitive sports in 2026 with structure, support, and recruiting guidance.
Supporting First-Generation Students in Boarding Schools
Supporting First-Generation Students in Boarding Schools
A 2026 guide to supporting first-generation students in boarding schools, with strategies for access, retention, and family engagement.

Featured Schools